Following yesterday's (June 1) Coca-Cola 600 in Charlotte, North Carolina, NASCAR has slapped three crew chiefs with heavy fines for violating several rules - one even declared as 'illegal'.

Greg Biffle's crew chief, Brian Pattie, got hit with the worst of it, but Kurt Busch's chief and AJ Allmendinger's also received some heavy-handed discipline following the race closure.

Biffle himself was docked 15 points for what ESPN describes as "illegal body measurements" and his chief, Pattie, got slapped with a $50,000 fine, placed on probation, and suspended from all points races through mid-June. This was classified as a P3 violation.

Chiefs for Busch and Allmendinger (Gibson/Burnett) each were saddled with a $20,000 fine and also placed on probation. Additionally, they were suspended from this weekend's forthcoming Sprint Cup Series race in Pocono.

NASCAR officials discovered that Gibson and Burnett failed to secure the required five lug nuts on each wheel after the race. It was during NASCAR's review of Biffle's car in their Research and Development Center, that they uncovered the body violations that earned Pattie his fine and suspensions.

This is just the latest in a slew of fines and punishment handed out as NASCAR cracks down on violations - especially on their highly-controversial lug nut policy.

Watch the video below about another suspension that happened just over a month ago when Ricky Stenhouse Jr.'s chief also received a P3 violation.